Microsoft Chairman Bill Gates explains why his philanthropic foundation helps fund genetically modified food research. "You are right on the verge of starvation all the time, so every tool that's safe and appropriate, you at least want to look into," he says.

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World leaders and CEOs at the Davos 2010 World Economic Forum participate in a panel called Rethinking how to feed the world. The panel discusses the challenges facing global food production and possible solutions that will increase yield and support agricultural producers worldwide.